Thank you for your feedback, Rob. I totally get where you are coming from. Unfortunately, it wouldn't be much of a gambling game if there was a way to reliably determine vampire cards. It's just not that kind of game.
I will say that the chances are more in your favor than you make them out to be. For example, you can always chose not to gamble on a high-stakes turn. You can simply pass and still walk away with a solid sum.